Cisco uBR905 Installation Manual page 59

Chapter 4 Troubleshooting
Table 4-2
LED
OK
1, 2, 3,
or 4
LINK
DS
OL-0598-01 (9/2000)
General Troubleshooting Tips
Status Possible Problem
System status Power cord not properly
LED is off. seated.
Power outlet not operating.
Power supply has failed.
The router failed its self-test.
Ethernet LEDs PC/device not powered on.
are off when
data is Bad Ethernet connection.
transmitted
to/from the
device.
Incorrect cable between the
router, the hub if applicable
and the PC.
Faulty Ethernet card.
Cable RF LED Router searching for a signal;
is off. RF levels wrong.
Cable is out.
Cable RF LED Router is locked to a signal and
is blinking. connecting to the headend per
DOCSIS.
Downstream RF coaxial cable is not
LED is off. properly connected to the
router.
Troubleshooting Subsystems
Suggested Action
Check power connections.
Check the outlet.
Contact field service dispatch to replace
the power supply.
See Table 4-1 or contact field service
dispatch to replace the unit.
Verify that the PC/device is powered on.
Reseat the Ethernet cable at both ends.
Make sure that TCP/IP software is
installed and DHCP is enabled.
Replace the cable, reviewing the hub
user guide or Ethernet user guide.
Notify the subscriber to replace the
Ethernet card.
Check for a DOCSIS system signal and
verify that the nearby analog video
signal is within the correct range—0 to
+15 dBmV for most coaxial cable CATV
systems.
Check if the cable TV is working if the
subscriber also subscribes to broadcast
TV services.
Wait until the router completes
initialization. The router can temporarily
pause on a digital video signal during
installation, but eventually will time out
and locate the DOCSIS system signal.
Reconnect the cable.
Cisco uBR905 Router Hardware Installation Guide
4-5